This study focuses on the influence of roughness lay directionality on micropit crack formation, using a computational approach. A mixed lubrication model is implemented to find the surface tractions, which are used in a stress model to compute the near surface stress concentrations. With the stress amplitudes and means determined, the crack formation lives are assessed according to a fatigue criterion. It is found when the roughness lays of the two surface are parallel to the rolling direction and are out-of-phase, the resulted micropitting area percentage is minimum. The most severe micropitting activity is observed on the surface whose roughness lay is parallel to the rolling direction, while the roughness lay of its counterpart is normal to the rolling direction.
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April 2015
Research-Article
A Computational Study on the Influence of Surface Roughness Lay Directionality on Micropitting of Lubricated Point Contacts
Sheng Li
Sheng Li
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Sheng Li
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received July 13, 2014; final manuscript received November 12, 2014; published online December 12, 2014. Assoc. Editor: Dong Zhu.
J. Tribol. Apr 2015, 137(2): 021401 (10 pages)
Published Online: April 1, 2015
Article history
Received:
July 13, 2014
Revision Received:
November 12, 2014
Online:
December 12, 2014
Citation
Li, S. (April 1, 2015). "A Computational Study on the Influence of Surface Roughness Lay Directionality on Micropitting of Lubricated Point Contacts." ASME. J. Tribol. April 2015; 137(2): 021401. https://doi.org/10.1115/1.4029165
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